Rice, seasoned beef, vegetables, a fried egg, and gochujang — bibimbap is one of those high protein rice dinners where every bite is different and all of them are great.
Prepare all vegetables: blanch spinach and bean sprouts separately in boiling water for 1 minute, drain, and season each with a pinch of salt and 1 tsp sesame oil.
Julienne carrots and zucchini; sauté separately in a skillet with medium heat and 1 tsp sesame oil each until just tender, about 2–3 minutes per vegetable.
Sauté sliced shiitake mushrooms in 1 tsp sesame oil over medium-high heat for 3 minutes until they darken and soften; season with salt and pepper.
Mix beef sirloin with soy sauce, garlic, sugar, and black pepper; pan-sear on high heat for 2–3 minutes until browned but still juicy.
Fry eggs sunny-side up in a nonstick skillet over medium heat until the whites are set but yolks remain runny.
To assemble, divide rice among bowls, arrange seasoned vegetables and beef in sections, place a fried egg at the center, and spoon gochujang on top; sprinkle sesame seeds before serving.